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From: Andi Kleen <andi@firstfloor.org>
To: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Andi Kleen <andi@firstfloor.org>, Nick Piggin <npiggin@suse.de>,
	Jens Axboe <jens.axboe@oracle.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-fsdevel@vger.kernel.org,
	Ravikiran G Thirumalai <kiran@scalex86.org>,
	Peter Zijlstra <peterz@infradead.org>
Subject: Re: [rfc][patch] store-free path walking
Date: Fri, 9 Oct 2009 19:49:29 +0200	[thread overview]
Message-ID: <20091009174929.GD1656@one.firstfloor.org> (raw)
In-Reply-To: <1158166a0910080612h29d93d50y875d5305cd4d985f@mail.gmail.com>

> A few years ago when K7s were not ancient yet, after hearing
> argument for and against non-temporal stores,
> I decided to finally figure it for myself.
> 
> I tested kernel build workload on two kernels with the only
> one difference - clear_page with and without non-temporal stores.
> 
> "Non-temporal stores" kernel was faster, not slower. Just a little bit,
> but reproducibly.

I did the same experiments and in my case (K8) they were slower in 
real-world benchmarks for clear_page (but faster in micro benchmarks)

But I didn't propose non temporal anyways.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.

  parent reply	other threads:[~2009-10-09 17:50 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-06  6:49 Latest vfs scalability patch Nick Piggin
2009-10-06 10:14 ` Jens Axboe
2009-10-06 10:26   ` Jens Axboe
2009-10-06 11:10     ` Peter Zijlstra
2009-10-06 12:51       ` Jens Axboe
2009-10-06 12:26   ` Nick Piggin
2009-10-06 12:49     ` Jens Axboe
2009-10-07  8:58       ` [rfc][patch] store-free path walking Nick Piggin
2009-10-07  9:56         ` Jens Axboe
2009-10-07 10:10           ` Nick Piggin
2009-10-12  3:58           ` Nick Piggin
2009-10-12  5:59             ` Nick Piggin
2009-10-12  8:20               ` Jens Axboe
2009-10-12 11:00                 ` Jens Axboe
2009-10-13  1:26             ` Christoph Hellwig
2009-10-13  1:52               ` Nick Piggin
2009-10-07 14:56         ` Linus Torvalds
2009-10-07 16:27           ` Linus Torvalds
2009-10-07 16:46             ` Nick Piggin
2009-10-07 19:25               ` Linus Torvalds
2009-10-07 20:34                 ` Andi Kleen
2009-10-07 20:51                   ` Linus Torvalds
2009-10-07 21:06                     ` Andi Kleen
2009-10-07 21:20                       ` Linus Torvalds
2009-10-07 21:57                         ` Linus Torvalds
2009-10-07 22:22                           ` Andi Kleen
2009-10-08  7:39                             ` Nick Piggin
2009-10-09 17:53                               ` Andi Kleen
2009-10-08 13:12                           ` Denys Vlasenko
2009-10-09  7:47                             ` Nick Piggin
2009-10-09 17:49                             ` Andi Kleen [this message]
2009-10-07 16:29           ` Nick Piggin
2009-10-08 12:36           ` Nick Piggin
2009-10-08 12:57             ` Jens Axboe
2009-10-08 13:22               ` Nick Piggin
2009-10-08 13:30                 ` Jens Axboe
2009-10-08 18:00                   ` Peter Zijlstra
2009-10-09  4:04                     ` Nick Piggin
2009-10-09  8:54                 ` Jens Axboe
2009-10-09  9:51                   ` Jens Axboe
2009-10-09 10:02                     ` Nick Piggin
2009-10-09 10:08                       ` Jens Axboe
2009-10-09 10:07                   ` Nick Piggin
2009-10-09  3:50             ` Nick Piggin
2009-10-09  6:15               ` David Miller
2009-10-09 10:40                 ` Nick Piggin
2009-10-09 11:09                   ` Jens Axboe
2009-10-09 10:44                 ` Nick Piggin
2009-10-09 10:48                   ` Jens Axboe
2009-10-09 23:16         ` Paul E. McKenney
2009-10-15 10:08 ` Latest vfs scalability patch Anton Blanchard
2009-10-15 10:39   ` Nick Piggin
2009-10-15 10:46     ` Anton Blanchard
2009-10-15 10:53   ` Nick Piggin
2009-10-15 11:23     ` Anton Blanchard
2009-10-15 11:41       ` Nick Piggin
2009-10-15 11:48         ` Nick Piggin

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